package com.itheima.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.common.R;
import com.itheima.entity.Employee;
import com.itheima.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登入
     *
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {
        //1、将页面提交的密码password进行MD5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2、将页面提交的用户名username查询数据库
        //Lambda匿名函数 java8新增特性，可以使函数作为一个方法参数
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();  //LambdaQueryWrapper是MP的Lambda条件判封装类
        queryWrapper.eq(Employee::getUsername, employee.getUsername()); //条件
        Employee emp = employeeService.getOne(queryWrapper);   // getOne(根据 Wrapper，查询一条记录

        //3、如果没有查询带则返回登入失败结果
        if (emp == null) {
            //静态方法直接调用
            return R.error("登入失败");
        }

        //4、密码对比，不一致返回登入失败结果
        if (!emp.getPassword().equals(password)) {
            return R.error("登入失败");
        }

        //5、查看员工状态，如果为以禁用状态，则返回员工已禁用结果
        if (emp.getStatus() == 0) {
            return R.error("账号已禁用");
        }

        //6、登入成功，将员工id存入Session并返回登入成功结果
        request.getSession().setAttribute("employee", emp.getId());

        return R.success(emp);
    }

    /**
     * 员工推出
     *
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        //清理Session中保存的当前登入员工的id
        request.getSession().removeAttribute("employee");
        return R.success("推出成功");
    }

    /**
     * 新增员工
     *
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) {
        log.info("信息-----", employee.toString());

        //设置初始密码123456，MD5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        /*employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //获得当前用户id--登入时Session保存的就是employee.id
        Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);*/

        employeeService.save(employee);
        return R.success("新增员工成功");
    }

    /**
     * 员工信息分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return 前端respond 数据类型为records-数据信息、total-页数，employee类中并没有定义，所以用MP中的page类
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        log.info("page={},pageSize={},name={}", page, pageSize, name);

        //构造分页构造器
        Page pageInfo = new Page(page, pageSize);

        //条件构造器 相当于where
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();
        //添加过滤条件-模糊查询 isNotEmpty判断是否为null，是null-like就不执行  StringUtils是一个专门判断空值的实现类
        queryWrapper.like(StringUtils.isNotEmpty(name), Employee::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        //执行查询
        employeeService.page(pageInfo, queryWrapper);

        return R.success(pageInfo);

    }

    /**
     * 根据id修改员工信息
     *
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request, @RequestBody Employee employee) {
        log.info(employee.toString());

        /*Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(empId);*/
        employeeService.updateById(employee);

        return R.success("员工信息修改成功");
    }

    /**
     * 根据id查询员工信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getByid(@PathVariable Long id) {
        log.info("根据id查询员工信息");
        Employee employee = employeeService.getById(id);
        if (employee != null) {
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息");
    }
}
